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26 lines
1018 B
Markdown
26 lines
1018 B
Markdown
# List Functions For A Module
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During an `iex` session, I can do a little introspection on modules using
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either the
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[`__info__/1`](http://elixir-lang.org/docs/stable/elixir/Module.html#__info__/1)
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function or Erlang's
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[`module_info/0`](http://erlang.org/doc/man/erlang.html#module_info-0)
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function. In particular, I can pass `:functions` to either one to get a list
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of the functions for that module.
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This is what `__info__/1` looks like for the functions of the `List`
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module:
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```elixir
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> List.__info__(:functions)
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[delete: 2, delete_at: 2, duplicate: 2, first: 1,
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flatten: 1, flatten: 2, foldl: 3, foldr: 3, insert_at: 3,
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keydelete: 3, keyfind: 3, keyfind: 4, keymember?: 3,
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keyreplace: 4, keysort: 2, keystore: 4, keytake: 3,
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last: 1, replace_at: 3, to_atom: 1, to_existing_atom: 1,
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to_float: 1, to_integer: 1, to_integer: 2, to_string: 1,
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to_tuple: 1, update_at: 3, wrap: 1, zip: 1]
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```
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[source](http://stackoverflow.com/questions/28664119/in-elixir-is-there-any-way-to-get-a-module-to-list-its-functions)
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